Incandescent electric lamp



Apr. 10, 1923.

G. W. TURNER INCANDESCENT ELECTRIC LMP Filed Feb 4, 192].

Patented Apr. 10, 1923.

UNITED STATES GEORGE WASHINGTON TRNER, OF CLEVELAND, OHIO.

INCANDESCENT ELECTRIC LAMP. l

Application filed February 4, 1921. Serial No. 442,472.

To all zl'laom 'it may concern Be it known that I, GEORGE TAsiiINGToN TURNER. residing at Cleveland, in the county of Cuyahoga and State of Ohio. a citizen of the United States, have invented certain new and useful Improvements in Incandescent Electric Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in incandescent electric lamps and more par-` ticularly to means for allowing'jthe filaments to be renewed.

The invention consists in the several features and in the construction, combination and arrangement of such features as more fully hereinafter described and claimed.

The object of the invention is to provide a lamp with means by which the filament may be removed, when it has burned out or otherwise been destroyed, and a new filament supplied thereby enabling the lamp to be used over and over again indefinitely.

A further object is to provide a lamp with a plug and bulb which are detachable and with means for producing a vacuum in the bulb after the plug and bulb have again been connected together and rendered airtight.

A further object is to provide a lamp which is simple, inexpensive and durable in construction and attractive in appearance.

Referring to the drawings Fig. 1. is central vertical sectional view of an incandescent lamp showing my invention applied thereto, the plug being shown in elevation.

Fig. 2. is a side view in elevation of the plug and filament removed from the bulb.

Fig. 3. is a side elevation of the connecting sleeve for the plug and bulb.

In the drawings in which similar reference characters d enote similar parts throughout the several views` 1 represents a Mazda incandescent electric lamp having a plug 2 provided with screwthreads 3, and a filament 4 all of the usual well known standard size and construction now in general use, and 5 the glass bulb.

In order to provide means whereby the lamps filament may be renewed, instead of throwing the lamp, away when it becomes burned out or otherwise destroyed, a removable sleeve 6 is provided for connecting the .filament and then screw the plug 2 and glass bulb 5, which comprises an upper screwthreaded pbrtion 7, a lower portion 8 having an outwardly inclined flange 9 at its lower edge to which the upper portion or neck 10 of the bulb 5 is hermetically secured by means of cement or in any other desired manner. If found desirable the plug and sleeve may be secured together by cement or by any other means.

In order to provide means for allowing the exhaust of air or the producing of a vacuum in the bulb 5 after a burned out or destroyed filament and plug has been removed and a new filament installed in the plug, a laterally extending tube 11 is formed on the side of the sleeve 6, just below the screwthreaded portion 7, which is preferably provided with a tapering plug valve 12, well known in the gas fixture art, but any other style or character of valve may be used when desired.

In use after a filament has bunred out or been destroyed, instead of discarding or throwing the entire lamp away and procuring a new one, it is only necessary to remove the plug carrying the burnt out filament by unscrewing it from the sleeve, renew the plug carrying the new filament securely in place again in the sleeve, after which the vacuum which was broken or destroyed by the removal of the plug 2 is restored by attaching an air suction pump or otherdevice Suitable for the purpose to the tube 11, and after exhausting the air and restoring the vacuum in the bulb to then close the tube 11 by shutting ofi the valve 12, after which the lamp is ready for use.

I do notwish to be understood as limiting myself tothe specific details of construction and arrangement as herein described and illustrated, as it is manifest that variations and modifications may be made in the features of construction and arrangement in the adaptation of the device to various conditions of use without departing from the spirit and scope of my invention and improvements. I therefore, reserve the right to al] such variations and modifications as properly fall within the purview of my invention and the terms of the following claim.

What I claim is In an incandescent lamp, a screwthreaded plug carrying a filament, a bulb in which the filament is located and a thin metal sleeve having an upper screwthreaded portion valve centrolling the passage through said forming a socket for receiving the plug, a, tube to the interior of the sleeve for mainlower portion having a neck, said neck retaining and destroying a vacuum in said 10 ceiving the upper end of the bulb and a tube bulb.

5 intermediate the screwthreaded and neck In testimony whereof I have affixed my portions of said sleeve communicating With signature.

the inte-rior thereof and provided with a GEO. WASHINGTON TURNER. 

